Yu-ha Teacher, What's in the Mailbox?
"Oh, Chief Ryu. You're early today?"
"Good morning, ma'am."
Monday morning. On her way to work, Ryu Se-hee ran into another teacher.
It was a lady in her late forties. Third grade, maybe...?
With such an age gap, she greeted her senior politely.
Even though Ryu Se-hee held the title of chief, she was only in her seventh year.
That put her pretty much on the low-seniority end of the spectrum at school.
The place was crawling with 20-year vets and 30-year lifers, so seven years barely got you a business card.
Tae-oh Teacher, with his four years, or Yu-ha Teacher, with just two, were straight-up treated like babies.
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"Hm? No suit today? Chief Ryu, new outfit?"
The lady teacher eyed Ryu Se-hee up and down.
"Ah... yes. It's at the cleaners."
"The suit looked sharp. Though wearing one every day must be a pain."
"...I'm fine. Gotta dress properly in front of the kids."
"Still, loosen up like today sometimes. Changes the vibe. Kids pick up on every little thing about a teacher's look—especially with female teachers."
"...I'll keep that in mind."
Ryu Se-hee nodded at the teacher's words.
She wasn't wrong. Ryu Se-hee knew from experience.
"Chief Ryu, you've got a different vibe lately? Not like before."
"Pardon?"
"Nah, just... you used to seem all prickly. Now you're way more relaxed. Something good happen?"
"Ah......"
"Looks good on you, in my opinion."
"...Does it?"
Well, "before" probably meant back when she was stressing over those loan sharks, so yeah, of course.
But now it was Tae-oh Teacher stressing her out instead of the loans...
Stress was stress—no reason she'd look any different.
What the hell had changed?
"Hm? Speak of the devil—Tae-oh Teacher~."
"...!"
"Tae-oh Teacher~!"
Ryu Se-hee jumped. The lady teacher turned and waved.
Looking back, there was Tae-oh Teacher climbing out of his car.
"Ah, ma'am!"
"Kuh..."
The second she saw his calm face, she bit her lip hard.
"Morning, teachers. Good weekend?"
"Oh yeah~. Tae-oh Teacher, you're looking sharper by the day~?"
"Haha..."
Tae-oh Teacher chuckled awkwardly and turned to her.
Bowing his head casually in greeting, like it was nothing.
"Good weekend, ma'am?"
"Kuh........."
Acting all cool in front of another teacher...!
He knew better than anyone how she'd spent her weekend—how could he be so shameless?
But she couldn't call him out with someone else there.
"Y-yeah......"
"Cute outfit today. What's up? No suit?"
"...At the cleaners."
You bought it for me...! Told me to wear it!
He knew damn well and was playing dumb.
The lady teacher, who'd been watching quietly, suddenly poked Ryu Se-hee's side.
"Aha~. I get it now."
"Pardon?"
"Hehe... I must've been blind. Got it. I'll leave you two be."
What...?
"N-no, ma'am! It's not what you think...!"
"Have fun~. You look good together."
"It's not like that...!"
"Gotta run! Good luck~!"
She yelled after her, but the lady teacher bolted.
Tae-oh Teacher sidled up beside her.
"Why'd she rush off?"
"Kuh...... Your fault, Tae-oh Teacher!"
"Me? What'd I do?"
"Ugh...... Just... you know!"
Her head throbbed. This crap first thing in the morning.
That teacher was definitely gonna gossip to her grade-mates.
Something about her and Tae-oh Teacher being an item or whatever...
Once the older crowd started buzzing in the morning, the whole staff knew by afternoon.
"Ugh......!"
"Why start the day pissed off?"
"...Shut up! Get to class!"
"Gotta. Class. But Teacher."
"What...!"
"Check first, like I said last week."
Tae-oh Teacher's eyes dropped to her pants.
She felt the panties underneath squeezing tight.
The ones he'd made her wear this morning.
He wanted proof of the beaded panty, obviously.
"Ha......"
"Over there?"
He nodded toward the quiet back of the storage shed.
Wearing this to school... and showing it off?
Should I just... tell him?
She had 600,000 won in her account now.
That'd cover interest for today and tomorrow—three days total. Buy her a brief break from his groping.
Tell him? Pay today's interest, so hands off?
"......"
"What? Come on."
"Listen, Tae-oh Teacher......!"
"Yeah?"
He turned.
Her mouth wouldn't move.
She had to say it.
Today's interest paid—no touching...!
She wavered, then mumbled softly.
"......Just checking."
Tae-oh Teacher smirked.
"Of course. Obviously."
Of course it didn't end at just checking.
***
During break, I slipped into the admin office.
Sure, I'd confirmed the graphics card Park Sung-hoon sold Saturday was from the 'school flea market.'
But that didn't prove it was our school's property he'd embezzled himself.
Suspicion was 100%, yeah.
But I needed ironclad proof.
Reporting with shaky evidence could fizzle out.
To make it airtight... print the inventory ledger and cross-check.
If the serial number was there, it was school property.
Tried logging into K-EduFine with my ID—no access.
Inventory perms were mostly admin office.
Knock knock. I stepped in.
"Morning."
"Oh, who do we have? Han Tae-oh Teacher?"
The admin officer greeted me warmly.
No one else around. All out playing hooky.
I approached the lone officer.
"Long time. Good weekend, sir?"
"I was fine. But that face—you need a favor?"
"How'd you know?"
"I read you like a book, Tae-oh Teacher. Obvious."
Damn, she knew her stuff.
"Need the inventory ledger. And delivery inspection forms."
"Ah~ the mirroring thing?"
"Yeah, exactly."
Even knew about my temp gig.
Lucky the mirroring gave me a solid excuse to check gear lists.
She scooted her chair back and stood.
"Logged in here—print it yourself."
"That okay?"
"Trust you~. You know how?"
"Yeah, you showed me last time."
"Good, I won't watch. Bathroom break."
"Sure."
I plopped into her seat quick.
Bathroom meant smoke break too—30 minutes easy.
Using someone else's ID for official docs? Against rules, sure.
But school never cared. Chief might FM it, but he wasn't here.
Empty office—perfect. Dove into K-EduFine.
Printed the mirroring delivery inspection first—for cover.
Then graphics cards. Old model, so dug through prior years' docs. Finally found it.
2024... delivery inspection. Serial number...
Matched my phone pic.
...Jackpot!
I snapped my fingers.
Proof we'd bought it with school funds—like finding the receipt.
Printed it, highlighted the serial.
Park Sung-hoon, you mad bastard.
Selling a card registered in the school ledger on Carrot Market?
A quick lookup would've busted him—what balls.
...Wait.
This was just the receipt.
Checked the inventory ledger.
"......Gone?"
Not listed.
Bought before, but not school property now...?
To remove assets, official procedure: disposal docs.
If I was right, Park Sung-hoon filed something.
Searched his docs—bingo.
New graphics cards bought this year.
And... several old ones 'defective,' disposed.
Disposal list had my serial. Eight cards total, bought just two years ago.
Got it.
Park labeled good cards 'defective,' filed docs to scrap on paper.
Slipped in new ones, sold the olds on Carrot.
"......Fucking psycho."
But not easy.
School ain't dumb.
Disposal needs 'disuse proof'—photos or vids with the docs.
I'd trashed old gear once: drilled holes, smashed with hammer, even burned it on video.
How'd he fake it?
Opened his disposal vid file.
"Ha. Shit."
Burst out laughing.
Drill pierces the card—no debris.
Sound off on the hole timing.
His fingers holding it squish through the card slyly.
Ridiculous.
...AI fake video?
"This sloppy edit works?"
It would. Approvers were principal and admin head—old timers.
They wouldn't spot AI fakes.
Two-year-old cards junk? Laughable to us, but not them.
Audit team might catch it later... but even they might miss AI.
Park Sung-hoon played it smart.
Telling them it's fake? Nah.
No need—the 'scrapped' card's pristine at my place. That's proof enough.
Printed all docs, downloaded vids to USB.
"Evidence secured..."
Now, how to use it.
Mulled it all weekend.
Report to Blue House Petition? Fastest for public servants—investigation pronto.
I flash undeniable physical proof, he faces disciplinary board, fired.
Loses job, pension. Criminal charges—probation at least, no real jail maybe.
No teaching ever again. How he eats after? Not my problem.
Clean revenge on Park Sung-hoon—feels good.
...Nah.
Wasted on a report with this leverage.
I hold his lifeline—what can't I do?
Ways to drag him lower than reporting...
"Gotta be that, right?"
Pocketed prints and USB, left the office.
Outside, a high, clear voice made me look up.
"Eek!? 2-2 Teacher?"
"Yu-ha Teacher?"
Min Yu-ha stood there. Why here?
Her back—mailboxes.
Oh yeah, told her daily: panties and bra in the admin mailbox.
Her hands empty.
Just put 'em in, huh.
I smiled casually at her.
"Morning, Yu-ha Teacher?"
"Ah...... G-good morning..."
"What brings you here? Class soon."
"Uh... th-that, um...!"
Stammering, face beet red.
Still can't lie, huh.
...Fresh from stuffing undies.
So... no bra, no panties right now?
My eyes drifted to her body without thinking.
Right now, under those clothes... no bra, no panties...?
Top's whatever, but that short skirt with no panties...?
Wanna see.
Flip it up right now...!
Hold back. Must.
Haven't revealed I'm the DM blackmailer yet.
...But passing it up feels like a waste.
"I-I... came to check the mailbox..."
"Ah~. Makes sense. I was grabbing docs."
"...Really?"
"Yeah. Mind stepping aside?"
".........Huh?"
Min Yu-ha's eyes went wide.
I grinned and stepped to the mailboxes.
She frantically blocked it.
"Ah......! W-wait! Just a sec...!"
"Yeah? Why?"
"N-no... not now......"
"Problem with the mailbox?"
"Th-that's......"
She glanced down at it.
Yeah, problem.
Her class box had her warm, just-removed panties and bra...!
I reached out, playing dumb.
"Step back a bit? You're blocking my class box."
"Ah.... But......"
"It's fine. Just grab mine quick."
"......Ugh....... Okay......"
Min Yu-ha reluctantly moved.
Sixth-grade boxes: Class 1, 2, 3 side by side.
I took a deep breath.
Click.
"......Huh?"
I opened Class 3's box.
The one with her fresh white panties and bra inside.
"Whoa~. Yu-ha Teacher, what's this?"